Photographic developing apparatus.



PATENTED NOV. 17, 1903.

I E. E. PARK. PHOTOGRAPHIG DEVELOPING APPARATUS.

APPLICATION FILED NOV.21, 1902.

N0 MODEL.

UNITED STATES Patented November 17, 1903.

EDWARD E. PARK, OF SAN FRANCISCO, CALIFORNIA.

PHOTOGRAPHlC DEVELOPING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 744,602, dated November17, 1903.

Application filed November 21, 1902. Serial No. 132.24% (No model-l Toall whom it may concern.-

Be it known that I, EDWARD E. PARK,& citizen of the United States,residing in the city and county of San Francisco, State of California,have invented an Improvement in PhotographicDevelopingApparatus5 andlhereby declare the following to he a full, clear, and exact descriptionof the same.

My invention relates to an improvement in apparatus for developingphotographs.

It consists of one or more hinged or tilting plates dipping into thetrays containing the developing solution so as to lie beneath the plateswhich are being developed, means for alternately raising and loweringthe plates so as to agitate the developing liquid and also to serve toraise the plate out of the liquid when it is desired to removethem, andmeans by which said tilting plate or plates may be actuated.

It also comprises details of construction,

' which will be more fully explained by reference to the accompanyingdrawings, in which- Figure 1 is a perspective view of my invention,showing arrangement. Fig. 2 is a crosssection through wings and trays.

In the developing of photographic plates and the like it is desirable toconstantly agitate the developing solution within the trays in which theplates are immersed.

It is the object of my invention to provide an attachment or device bywhichthe developing liquid can be agitated without moving or handlingthe trays and by which the plates may be raised out of the liquid whenit is desired to remove or inspect them.

As shown in the accompanying drawings, A represents trays of anysuitable or desired size to fit the plates which are to be developed andadapted to contain the developing liquid.

2 is a suitably-journaled shaft, which has loosely attached or hinged toit the wings or leaves 3.

If a single tray only is being employed, a single wing will besufficient; but for economy in developing a large number of plates, andespecially where a developing liquid of different strength or characteris necessary for diiferent plates,a convenient arrangement would be tohave a series or" these trays disposed side by side in line eitherendwise or transversely from the position of the operator, and the shaft2 is journaled to extend between the whole series of trays, having wingsattached to it at points which will allow the wings to dip into thetrays upon opposite sides of the shaft. These wings are so bent as toapproximately lie upon the bottom of the trays and have suflicient widthor extent so that the plates to be developed may lie upon the extensionsof the plates within the trays.

The shaft 2 may have projections or arms 4: of any suitable or desiredform extending beneath the wings so as to contact with them at a shortdistance from the hinged points. Thus when the shaft is turned in onedirection the projections will raise the wings upon one side, and thesewings will correspondingly raise the plates beneath which they lie. Apartial rotation of the shaft in the opposite direction will raise thewings in the plates upon the opposite side. Thus any number of traysfrom one up within the ability of the operator to turn the shaft may bein use and developing be carried on within the trays, and each tray mayhave a developing solution such as is needed for the particular plate tobe developed.

The alternate raising and lowering of the plates within the developingliquid causes a constant agitation and flow of the liquid over thesurfaces of the plates, so as to constantly agitate and apply the liquidto the plates to the best advantage.

In the ordinary. methods of developing plates whenever it is necessaryto examine or remove the plates some device is required to lift them outof the liquid. These wings serve perfectly for this purpose, and theedges of the plates can at any time be raised so that any one or more ofthem can be removed or examined and again returned. It will be manifestthat these wings may be made of any suitable or desired material, eitherwood, rubber, porcelain, metal, or any other equivalent substance andthat any number of the Wings may be employed either in pairs or singly.

The shaft by which the plates are actuated is preferably journaled uponsupports suitably placed. with relation to the trays and sufficiently,high or wide sothat the wings will clear the upper edges of the trays.

The shaft-supports may have stops fixed at any suitable point, and lugsor projections or equivalent devices carried by the shaft 2 will beadapted to contact with the stops, so as to limit the amount ofoscillation of the shaft and the consequent raising of the plates ineither direction.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination Withapairof separated developing-trays, of a shaftsupported centrally between the trays; wings hinged to said shaft andextending right and left therefrom one of said wings adapted to dip intothe solution of each tray and lie beneath the plate; and projections onthe shaft extending right and left therefrom and extending beneath thewings whereby each wing may be alternately lifted and depressed withinthe solution.

2. The combination with a double row of developing trays; of a supportextending through the space between the rows of trays; a shaft mountedin the upper portion of said support; pairs of right and left extendingwings, hinged together at their meeting edges, each of said wingsadapted to dip into a tray; and projections at different points on theshaft extending right and left therefrom and beneath the wings of eachpair to alternately raise and lower the wings and superposed plates.

In witness whereof I have hereunto set my hand.

ED \VARD E. PARK.

Witnesses:

GEO. T. KNOX, A. WOLF.

